We have investigated that a couple of soft ferrite ceramic powders having a spinal structure have shown the effect on growth and secondary metabolites production of some medicinal plants cultured in vitro. The addition of the ceramic powders as bare state to culture medium has stimulated the growth of Achyranthes japonica callus and plantlet, adventitious root of Hyoscyamus niger and Platycodon grandiflorum hairy root about 65, 75, 150 and 50%, respectively. Whereas Centella asiatica callus and plantlet, Scopolia parviflora hairy root, and Hyoscyamus albus adventitious root were not affected markedly. Moreover, the ceramic powder has enhanced the growth of H. niger adventitious roots even under conditions of irradiating alone without any direct contact between ceramic powder and media. Based on growth stimulation effect, the ceramic powders have enhanced the gross production of tropane alkaloid in H. niger adventitious root, and polyacetylene in P. grandiflorum hairy root about 35 and 30%, respectively.

A new light pink colored standard rose (Rosa hybrida Hort.) cultivar “Temperla” was developed at the Jeollanamdo Agricultural Research and Extention Services (JARES) after seedling and line selection in 1999, and its characteristics were examined two time

A new orange-red colored standard rose (Rosa hybrida Hort.) cultivar ‘Scarla’ was developed at the Jeollanamdo Agricultural Research and Extention Services (JARES) after bud selection and line selection for three times from 1999, and its characteristics w

This study was conducted to identify the genetic basis of the domestication-related traits in weedy rice. An RIL population consisting of 80 lines was developed from a cross between the japonica weedy rice, Hapcheonaengmi 3 and the Tongil-type cultivar Mi

This study was conducted to identify the genomic regions associated with cold tolerance in rice. An RIL population consisting of 120 lines was developed from a cross between the japonica cultivar, Hwayeongbyeo and the wild rice, Oryza rufipoon Griff. Acc.

Diversity and relatedness of 64 rice accessions were evaluated using 85 simple sequence repeats (SSRs) markers. These64 accessions represent a set of international and Korean blast diferential cultivars, a set of blast monogenic lines, donors of blastresi

An effective grafting method for jujube nursery trees was developed to shorten the operation time, improve the percentage of "takes" and shoot emergence, and form the better graft union. Out of 7 grafting methods, the splice, modified scion Ono graft and the bark graft showed relatively short operation time during the grafting operation comparing to the modified rootstock Ono graft or the chip budding. Among these methods, the bark graft demonstrated 100% "takes", but the modified scion Ono graft or the standard Ono graft showed 58.3% of "takes". The percentages of the vegetative shoot emergence were 100% for the bark graft, 70% for the modified scion Ono graft and lower emergence percent for the rest grafting methods. The union tissue formation for the modified scion Ono graft, the bark graft, or the whip-and-tongue graft was significantly larger than the standard Ono graft or the splice graft. In a close examination of the cross sectional areas of the graft union formation through the microscope, the bark graft was superior, the standard Ono graft was inferior and rest of the grafting methods were intermediate.

Through earlier breeding efforts, portions of the genome of the wild species Oryza grandiglumis (2n=48) have been introgressed into the rice cultivar, Hwaseongbyeo (Oryza sativa spp. japonica). Hwaseongbyeo was used as recurrent parent and O. grandiglumis

The backcross population obtained from a reciprocal cross between PD7 (A. inodora × 수식 이미지 A. psittacina) and P002 (A. inodora) was used for the QTL analysis. A total of 122 individual BC₁ 수식 이미지 plants were scored for 12 traits and interval ma

Genetic linkage maps of Alstroemeria Brazilian species were constructed using AFLP markers. Reciprocal backcross mapping population with 122 individuals was obtained between A. inodora and A. psittacina, Brazilian species that are commonly used in the com

Several plant growth regulators were examined for on their effect on the in vitro propagation of Kalopanax pictus(THUNB.) (NAKAI.) on WPM medium. Among the cytokinins tested, BA at 13.32 μM appeared to be the most effective for multiple axillary shoot formation. Although the addition of 2.89 μM GA3 promoted stem elongation, it produced morphologically abnormal leaves and stems. For rooting of the shoots, 4.9 μM IBA seemed to be more effective than 2.69 μM NAA. When the regenerated plants were transferred on artificial mixture containing vermiculite and peat-moss (1 : 1, v/v), 81% of them survived and grew normally.

The wild Pyrus plants belong to the deciduous woody plants in Rosaceae family. Most are cultivated for fruit productions, but some for ornamental plants. There are 5 Pyrus species including Pyrus ussuriensis and 8 varieties cultivated in Korea. In Korea, these plants are populated near villages or on the hills, and they are easily propagated since their fruit are very juicy and quite big in size. Plant breeding to get improved cultivars is not difficult because the Pyrus plants are easy to cross breeding among its genus. Because not only this reason but there have been shown lots of variation in wild groups, the Pyrus plants inhabited in Korea are excellent deciduous woody plants and favorable fruit trees to develop ornamental plants. It is necessary to develop many kinds of fruit trees and ornamental trees containing genetically different character, so that it will be satisfied for many different people's taste and demands. Collecting lots of wild plant resource with diverse genes is necessary for plant breeding.